Hi, My computer was attacked by a persistent virus that prevx cannot remove. What is interesting about this virus is that it targets anti virus programs specifically, preventing them from working and also preventing you from making them work again. Here is what this virus does that I can find (probably the tip of the iceberg): 1. Stop windows update service periodically and disable it, preventing windows update from working. If you start it, it is being stopped within one minute or so. 2. Disable Prevx runtime monitoring periodically and shut the service down. Prevx will restart itself, but will be shut down almost immediately. 3. Block Prevx scans initiated by user. I suspect that the virus corrupted the prevx executable somehow. 4. Deleted executables of my other anti virus (MallwareBites) so it cannot run at all. 5. Prevent windows from starting in safe mode. Windows can only start in full mode. Another thing that I find interesting is that I cannot start a chat with Prevx support, which may mean that the virus blocks certain parts of prevx website from working. So not only the antivirus program does not work, it also blocks its support (I am assuming that they do want to contact me since I got an email to start a chat). I am not an expert in viruses, but I find it interesting that the virus has coded behavior to target specific anti virus programs and also coded behavior to prevent the common ways of removing it, such as safe mode. What does it do for its own benefit? Launch browser windows of phishing sites, both IE and Firefox. I hope thats all (but most likely not). At this point the only thing that I can think of is to uninstall windows. Not sure that the next OS on this computer will be windows. Since many consider prevx to be the top anti virus, does this mean that there is no more protection for windows anymore from viruses, even using browsers that are considered "safe" and top of the line anti virus programs? Any help appreciated, I basically wrote this computer off, which is quite bad since it is my main computer and I also don't want to risk using the backed up files that may contain the virus.